Or another fun one. One of the first acts of the newly formed Athenian Democracy would be to charge Socrates with "corrupting the minds of the youth" and "impiety." And they ultimately decided to kill him over this, on a split [democratic] vote. Needless to say, views varied - to an absolutely extreme degree. To imagine there communal views on almost everything is just such an absolutely bizarre a notion to me. What led you to state/believe this?
Again I don't really understand how you could think people just held "communal" views on "almost everything" in the past. Can you offer literally even a single supporting example?
For example for most of human history, your community had a religion and set of etiologies explaining how the whole world worked. To disagree was to cast one’s self out of that community or to be cast out.
The most obvious examples of this is in ancient history how few political issues were actually campaigned on compared to today. Today every politician needs a public stance on hundreds of issues. Do you think that applied in ancient Rome or the various city states in Greece? People didn't care as much. There was less exposure to information, less granularity, and less individual empowerment.
Often times what separated politicians wasn't even the issues, it was their client base and direct familial connections. Issues were a secondary consideration.
Today, it doesn't matter what connections you have if you have the 'wrong' stances, even if trivial in fact (they don't have to actually believe or pursue them in office outside of token gestures) the performative dance politicians have to go through today is strikingly different than any time before. Thats directly because of homogenization of thought and how intensely voters value it.